Microgram to Carat Converter
Convert Microgram (µg) to Carat (ct) instantly. 1 µg = 5.000000e-6 ct.
Mass Converter
26 units available
1 µg = 5.000000e-6 ct
Formula:
ct = µg × 0.000005With your value: 1 µg = 5.000000e-6 ct
How big is that?
Everyday references on a logarithmic scale, all expressed in microgram so you can sanity-check the result.
Other Microgram to Carat conversions
Microgram to Carat Conversion Table
| Microgram (µg) | Carat (ct) |
|---|---|
| 0.5 | 2.500000e-6 |
| 1 | 5.000000e-6 |
| 2 | 1.000000e-5 |
| 5 | 2.500000e-5 |
| 10 | 5.000000e-5 |
| 15 | 7.500000e-5 |
| 20 | 1.000000e-4 |
| 25 | 0.000125 |
| 50 | 0.00025 |
| 100 | 0.0005 |
| 250 | 0.00125 |
| 500 | 0.0025 |
| 1000 | 0.005 |
Carat to Microgram Conversion Table
| Carat (ct) | Microgram (µg) |
|---|---|
| 0.5 | 100,000 |
| 1 | 200,000 |
| 2 | 400,000 |
| 5 | 1,000,000 |
| 10 | 2,000,000 |
| 15 | 3,000,000 |
| 20 | 4,000,000 |
| 25 | 5,000,000 |
| 50 | 10,000,000 |
| 100 | 20,000,000 |
| 250 | 50,000,000 |
| 500 | 100,000,000 |
| 1000 | 200,000,000 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Microgram (µg)
Mass
Traceable to the kilogram, defined by fixing the Planck constant at 6.626 070 15 × 10⁻³⁴ J·s. Avoirdupois masses derive from the 1959 international pound (0.453 592 37 kg exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Carat (ct)
Mass
The metric carat is exactly 200 mg, agreed internationally in 1907.
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Microgram to Carat
To convert from Microgram (µg) to Carat (ct), multiply the value by 5.000000e-6.
Formula: ct = µg × 0.000005
Reverse: µg = ct × 200,000
Step-by-Step Example
- Start with your value in Microgram. For example: 5 µg
- Multiply by the conversion factor: 5 x 5.000000e-6
- The result is: 2.500000e-5 ct
About Microgram
The microgram (µg) equals one millionth of a gram. Vitamins, hormones and trace contaminants are dosed at this scale.
Fun Fact: Clinical writing spells out "microgram" rather than using µg to avoid dosing errors.
Common uses: pharmacology, vitamin dosing, toxicology.
About Carat
The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
Fun Fact: The word "carat" comes from the carob seed, which was used as a balance weight in ancient gem trading.
Common uses: gemstones, diamonds, jewelry.
Frequently Asked Questions
How many Carat are in 1 Microgram?
There are exactly 5.000000e-6 Carat in 1 Microgram. This means the conversion factor from Microgram to Carat is 5.000000e-6.
What is the formula to convert Microgram to Carat?
The formula to convert Microgram to Carat is: ct = µg × 0.000005. For example, to convert 10 Microgram to Carat, you would multiply 10 by 5.000000e-6.
What is a Microgram?
The microgram (µg) equals one millionth of a gram. Vitamins, hormones and trace contaminants are dosed at this scale.
What is a Carat?
The carat equals 200 milligrams and is the standard unit for measuring gemstone weight.
What are the common uses of Microgram?
The Microgram is commonly used in pharmacology, vitamin dosing, toxicology.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Microgram to Carat converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/microgram-to-carat